1120121021 has 2 divisors, whose sum is σ = 1120121022. Its totient is φ = 1120121020.

The previous prime is 1120121011. The next prime is 1120121069. The reversal of 1120121021 is 1201210211.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 807184921 + 312936100 = 28411^2 + 17690^2 .

It is a cyclic number.

It is not a de Polignac number, because 1120121021 - 2⁶ = 1120120957 is a prime.

It is a super-2 number, since 2×1120121021² = 2509342203372164882, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1120120993 and 1120121011.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1120121011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 560060510 + 560060511.

It is an arithmetic number, because the mean of its divisors is an integer number (560060511).

Almost surely, 2^1120121021 is an apocalyptic number.

It is an amenable number.

1120121021 is a deficient number, since it is larger than the sum of its proper divisors (1).

1120121021 is an equidigital number, since it uses as much as digits as its factorization.

1120121021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8, while the sum is 11.

The square root of 1120121021 is about 33468.2091095416. The cubic root of 1120121021 is about 1038.5362238343.

Adding to 1120121021 its reverse (1201210211), we get a palindrome (2321331232).

The spelling of 1120121021 in words is "one billion, one hundred twenty million, one hundred twenty-one thousand, twenty-one".